This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 40 |
| 3 | 124 |
| 4 | 340 |
| 5 | 868 |
| 6 | 2116 |
| 7 | 4996 |
| 8 | 11524 |
| 9 | 26116 |
| 10 | 58372 |
| 11 | 129028 |
| 12 | 282628 |
| 13 | 614404 |
| 14 | 1327108 |
| 15 | 2850820 |
| 16 | 6094852 |
| 17 | 12976132 |
| 18 | 27525124 |
| 19 | 58195972 |
| 20 | 122683396 |
| 21 | 257949700 |
| 22 | 541065220 |
| 23 | 1132462084 |
| 24 | 2365587460 |
| 25 | 4932501508 |
| 26 | 10267656196 |
| 27 | 21340618756 |
| 28 | 44291850244 |
| 29 | 91804925956 |
| 30 | 190052302852 |
| 31 | 392989507588 |
| 32 | 811748818948 |
| 33 | 1675037245444 |
| 34 | 3453153705988 |